Home
Class 12
PHYSICS
When a capacitor of small capacitance is...

When a capacitor of small capacitance is connected in series with L-R circuit. The alternating current in the circuit increases. Explain why ?

Text Solution

AI Generated Solution

To explain why the alternating current in an LR circuit increases when a capacitor of small capacitance is connected in series, we can break down the reasoning into several steps: ### Step 1: Understanding the LR Circuit An LR circuit consists of an inductor (L) and a resistor (R) connected in series. The total impedance (Z) of the circuit can be calculated using the formula: \[ Z = \sqrt{R^2 + X_L^2} \] where \( X_L \) is the inductive reactance given by: \[ X_L = 2\pi f L \] and \( f \) is the frequency of the alternating current. ...
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    AAKASH SERIES|Exercise Exercises (Long Answer Questions)|2 Videos
  • ALTERNATING CURRENT

    AAKASH SERIES|Exercise Exercies (Short Answer Questions)|4 Videos
  • APPENDICES ( REVISION EXERCISE )

    AAKASH SERIES|Exercise REVISION EXERCISE (MAGNETISM AND MATTER )|52 Videos

Similar Questions

Explore conceptually related problems

At resonance in series R-L-C circuit

A charged capacitor of unknown capacitance is connected in series with 100kOmega resistance and an ideal ammeter. The initial current in the circuit is found to be 0.2mA and the current after 7 sec is found to be 0.1mA. The potential energy that was stored in the capacitor before it was connected in the circuit is ______mJ. [Take log_(2)2=0.7 ]

In L-C-R series AC circuit,

Three capacitors of capacitance 3 muF are connected in a circuit. Then, their maximum and minimum capacitance will be

A piece of semiconductors is connected in sereis in an electric circuit. On increasing the temperautre, the current in the circuit will

In Q.36 , the external resistance that must be connected is series with the main circuit so that the total current in the main circuit remains unaltered even when the galvanometer is shunted is

Why is ammeter connected in series and voltmeter in parallel in the circuit?

A series L-C-R circuit is operated at resonance . Then

There are 7 identical capacitors. The equivalent capacitance when they are connected in series is C. The equivalent capacitance when they are connected in parallel is

When an AC voltage, of variable frequency is applied to series L-C-R circuit , the current in the circuit is the same at 4 kHz and 9 kHz. The current in the circuit is maximum at

AAKASH SERIES-ALTERNATING CURRENT-EXERCISE - III
  1. When a capacitor of small capacitance is connected in series with L-R...

    Text Solution

    |

  2. If the alternating current I=I(1)cosomegat+I(2) sinomegat, then the rm...

    Text Solution

    |

  3. In a heating arrangement , an alternating current having a peak value ...

    Text Solution

    |

  4. In an AC circuit, the applied potential difference and the current flo...

    Text Solution

    |

  5. The instantaneous values of alternating current and voltages in a circ...

    Text Solution

    |

  6. An ideal choke takes a current of 10 A when connected to an ac supply ...

    Text Solution

    |

  7. An ideal choke takes a current of 8A when connected to an a.c. source ...

    Text Solution

    |

  8. When 100 V DC is applied across a solenoid , a current of 1 A flows in...

    Text Solution

    |

  9. In an L-R circuit, the inductive reactance is equal to the resistance ...

    Text Solution

    |

  10. An alternating voltage E = 200sqrt 2sin(100t) is connected to a muF ca...

    Text Solution

    |

  11. At a frequency omega(0) the reactance of a certain capacitor equal tha...

    Text Solution

    |

  12. An L-C-R series circuit consists of a resistance of 10 Omega a capacit...

    Text Solution

    |

  13. An L-C-R seriescircuit with a resistance of 100Omega connected to an A...

    Text Solution

    |

  14. An electric lamp designed for operation on 110 V AC is connected to a ...

    Text Solution

    |

  15. In a series LCR circuit the frequency of a 10 V, AC voltage source is ...

    Text Solution

    |

  16. A circuit draws 330 W from a 110 V , 60 Hz AC line. The power factor i...

    Text Solution

    |

  17. The natural frequency of an L-C circuit is 125000 cycles/s. When a die...

    Text Solution

    |

  18. The self inductance of the motor of an electric fan is 10 H. In order ...

    Text Solution

    |

  19. In an oscillating L-C circuit, the maximum charge on the capacitor is ...

    Text Solution

    |

  20. Powre dissipated in an LCR series circuit connected to an ac source of...

    Text Solution

    |

  21. Which of the following combination should be selected for better tunin...

    Text Solution

    |